Self-closing window.



E. H. LUNKEN a C. M. GONKLN.

SELF CLOSING WINDOW.

APPLIUATION FILED MAY 22,1907.

Patented Nov. 3, 1908. 3 SHEETS-SHEET l.

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acm/W we, zi @FM vL/M/ E, H. LUNKEN L M. GONKLIN.

SELF CLOSING WINDW.

APPLICATION FILED MAY 2:31 19u?.

Fatemef NOV. 3, i908.

3 SHEETS-SHEET 2.

E. H. LUNKEN & C. M. GONKLIN.

SELF CLOSING WINDOW.

APPLIOATION FILED MAY 22,1907.

Patented Nov. 3, 1908.

3 SHEETS-SHEET 3.

era/aww. Cif/Qa tically moving UNITED STATES PATENT OFFICE EDMUND LUNKEN ANI) CHARLES M. CONKLIN, OF CINCINNATI, OHIO,I ASSIGNORS, BYr

DIRECT AND MESNE ASSIGNMENTS, TO THE LUNKEN STEEL WINDOW GO., A CORPO- RATION OF OHIO SELF-CLOSING WINDOW."

To all whom it may concern:

Beit known that we, Eonuxn ll. liUNxnN and Cr-Linmes M. (oNKLIN, citizensl of the llnited States, residing at Cincinnati, Ohio, have invented certain new and useful Improvements in Self-Closing lllindows, of which the following is a speciication.

Our invention relates to improvements in scltclosing windows, and is designed more esliecially for use in connection with fireproot' or metallic windows, such as disclosed in an application filed by us Nov. 22, 1906,

Serial No. 344643, though not necessarilyy limited in this respect. We have shown it as embodied in the improved form of sash which forms the subject of another application tiled by us on the 11th day of March 1907, Serial No. 3624133.

The object of the invention is to provide among other things in connection with ver couuterbalanced window sashes, simple and durable means for effect.- ing the automatic closing of the upper and lower sashes which shall be reliable and cer tain in its action.

lVith these and other objects in view the invention includes the various features of construction and arrangement and combination of parts hereinafter described and particularly pointed out in the appended claims.

An embodiment of the invention is shown in the accompanying drawings, in which,n

Figure 1 is a front elevation showing a window frame with its accompanying upper and lower sashes. Fig. 2 is an enlarged Sectional detail showing the upper and lower corners in section and with the central portion of the frame broken away. Figs. 3 and 4 are detail views ou a larger scale, of the bracket and lever used in connection with the closing device for the upper sash. Fig. 5 is a sectional perspective view of a portion of the Jframe of the lower sash. Fig. is a` detail view of the fuse plate, and Itigs. 7 and 8 are detail views of the connection `between the steel sash cord and the chain.

Referring by reference characters to this drawing, the-numeral 1 designates the win dow frame or casing, and 2 and 3 the upper and lower sashes respectively. The frame as shown is supposed to be constructed of metal, as also are the sashes, the latter being provided with guiding edges or strips 4 designed to slide .in corresponding grooves or Specification of Letters Patent.

Application led May 22, 1907.

Patented Nov. 3.1908.

Serial No. 375,080.

ways in the window frame. In the form lshown in the drawing, these strips 4 are lshown as hollow and seated in grooves or channels formed by the projecting flanges 5 of the sash.

The upper sash is normally counterbalanced by weights G traveling in the weight pockets or guides of the window frame and connected to the upper sash by cords of steel or like incombustible material as shown at T.

Within each Weight pocket near its upper end is located a bracket 8 to which is pivoted a bell crank lever 9, the bracket having its angular turned part secured to the frame in any suitable manner as by rivetino'. Each lever has one arm extended vertically and is provided at its end with a link 10 extending through an opening in the frame. Two cords 11 extend from these links towards each other and are connected together by a fusible connection 12.

An auxiliary weight 14 has an eye 15 engaged by the other or short arm of each bell crank lever, and it will thus lbe seen that as long as the fusible connection above referred to Yis intact and the short arms of the levers `in horizontal position, the auxiliary Weights will be suspended from the levers. Should, however, the fusible connection be melted the bell crank levers will be free to rock into position to allow the weight to become detachedv and fall upon the main or counterbalancing Weights, when the combined weight of the two sets will overbalance the upper sash and cause it to be immediately closed.

In order to insure that each auxiliary weight shall drop equally upon the main weight, it is provided with a vertical passage through which the sash cord passes.

The lower sash is counterbalanced by weights 1G which are connected to cords 17 passing over pulleys in the top of the frame in the ordinary manner. These cords extend down within the hollow space formed between the edges of the sash and the side guide strips and are connected by a detachn able connection (also located in this hollow space) with chains 18. This connection preferably comprises a metal tube 18" into one end of which the end of the steel cord is braced or soldered, and a hook 19' which .has its shank similarly' secured in the other end and Vwhich engages a link of the chain. This forms a very convenient detachable and adjustable col'inection. The chains are passed through a hole 20 in the'channel iron of the sash and into the s ace or channel in the lower rail 21, in wliic is located a fuse plate 22 to which the end of the chains are usibly connected.

The plate or member 23 which covers the s ace 21 being removable affords access to t e fusible connection. Thus in case of ex cessive heat the fusible connection will. melt and the release of the chains will disconnect the weight and sash allowing the latter to at once close by gravity.

Having thus described our invention what we claim is 1. In combination,` a Window frame or casing, balancing Weights therein for the sash, cords connectlng the same to the sash, brackets secured within the frame near the upper corners, a bell crank lever pivoted to each bracket and having a vertically and a horizontally disposed arm, an auxiliary Weight suspended from the horizontal arm of each lever an a connecting means including a fusible ortion and extending through the Walls otp the frame and directly connecting the vertical arms of said levers, as described.

2. In combination, a Window frame, counter-balancin Weights therein, a sash having hollow side rame members, cords connected to said Weights and extending Within said side members, a sleeve connected to the end substantially of each cord, a hook carried by each sleeve,

a chain engaging each hook and fusible means for hol as described.

In' testimony whereof, We affix our signatures in presence of two Witnesses.

EDMUND H. LNKEN. CHAS. M. CONKLTN.

ing the chains, substantially Witnesses LANE THOMPSON, Guo. W., GILMORE. 

